近日，绍兴文理学院高晓辉团队研究了激光驱动等离子体纳米壳的高阶Mie共振和瞬态场增强。2025年12月22日出版的《物理评论A》杂志发表了这项成果。

研究组结合Mie理论与粒子网格模拟，证明了等离子体纳米壳通过高阶Mie共振可实现显著的场增强。在800纳米波长辐照下，优化的壳层几何结构能产生约三倍的电场增强，且这种增强在等离子体膨胀破坏共振前具有数十飞秒的瞬态建立时间。由于共振建立不充分，少周期脉冲产生的增强效果较弱。这些发现为优化激光-等离子体相互作用提供了依据，可应用于激光-团簇相互作用诊断及基于设计的核壳靶产生高能离子等领域，同时凸显了时间动力学在纳米等离子体共振中的关键作用。

附：英文原文

Title: High-order Mie resonance and transient field enhancement in laser-driven plasma nanoshells

Author: Xiaohui Gao

Issue&Volume: 2025/12/22

Abstract: We demonstrate substantial field enhancement in plasma nanoshells through high-order Mie resonances using combined Mie theory and particle-in-cell simulations. Optimal shell geometries yield approximately threefold electric field enhancement for 800-nm irradiation, with transient buildup times of tens of femtoseconds before plasma expansion disrupts resonance. Few-cycle pulses produce reduced enhancement due to insufficient resonance establishment. These findings enable optimized laser-plasma interactions for applications including diagnostics of laser-cluster interaction and energetic ion production from engineered core-shell targets, highlighting the critical role of temporal dynamics in nanoplasma resonances.

DOI: 10.1103/z4sw-kxlf

Source: https://journals.aps.org/pra/abstract/10.1103/z4sw-kxlf